Iwab0383e error validating parameters
In other words, we should go back to the way things were before we added parameter validation.Back in the old days, Windows didn't do parameter validation.So you will have two actions: one to display the form and another one to handle the POST.Of course the validation will occur in the second action and if some error occurs you will have to redirect to the first action.When constructing your external interfaces, it is probably better to specify what methods you expect an object to have rather than what class it should be of (or a child of).
The callback will be given the value of the parameter as its first argument.In this case you need a special trick to keep your errors during the redirect.Use the You can also use the validation annotations to easily add constraints to your model object’s properties, and then in the controller specify that all properties must be valid.This is defined in the object, this is how we tell hapi that the named parameter specified in the path should be validated.Joi's syntax is very simple and clear to read, the validator we passed here makes sure that the parameter is a string with a minimum length of 3 and a maximum length of 10.
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Additionally, plugins like hapi-swagger and lout can use the response-validation schemas to automatically document each endpoint's output format, thus ensuring that your documentation is always up to date.